List of megaprojects

While most megaprojects are planned and undertaken with careful forethought, some are undertaken out of necessity after a natural disaster occurs. There have also been a few human-made disasters. Major restoration was necessary after the destruction caused by World War I and II, some of which was paid for by German reparations for World War I and for World War II. ==Energy projects==

Research and development Physics and astronomy infrastructure Spacecraft Other spaceflight projects ==Sports and culture projects==

Every Olympic Games and FIFA World Cup in the latter part of the twentieth century and entering into the 21st century has cost more than $1 billion in arenas, hotels etc., usually several billions. The Olympic Games are considered to be the world's foremost international sporting event with over 200 nations participating. Sports-related costs for the Summer Games since 1960 is on average $5.2 billion (USD) and for the Winter Games $393.1 million. The highest recorded total cost was the 2014 Sochi Winter Olympics, costing approximately US$55 billion. The International Olympic Committee requires a minimum of 40,000 hotel rooms available for visiting spectators and an Olympic Village that is able to house 15,000 athletes, referees, and officials. ==Roads and transport infrastructure==

Ground transportation systems like roads, tunnels, bridges, terminals, railways, and mass transit systems are often megaprojects. Numerous large airports and terminals used for airborne passenger and cargo transportation are built as megaprojects. Africa Asia Europe North America South America Oceania ==Planned cities and urban renewal projects==

Africa Asia } taller than the Burj Khalifa. || Europe North America Oceania South America ==Water-related==

Ports, waterways, canals, and locks for ships carrying passengers and cargo are built as megaprojects. Africa Asia Europe North America South America ==Hospitals==

Europe North America ==Government and Administration==